Camera to give perspective to moving pictures



Oct. 14, 1941.v F. M. BROOKE CAMERA TO GIVE PERSPECTIVE TO MOVINGPICTURES Filed June 28, i940 5 Sheets-Sheet l \l WITNESSES:

Oct. 14, 1941. F. M. BROOKE 2,258,945

CAMERA TO GIVE PERSPECTIVE TO MOVING PICTURES 1 Filed June7 28; 1940 5Sheets-Sheet 2 xgv XW? El ATTORNEYS.

Oct. 14, 1941. F. M. BROOKE .2,258,945 CAMERA TO GIVE PERSPECTIVE TOMOVING' PICTURES Filed June 28, 1940 5 Sheets-Sheet 3 a n rs as@ S F: $4

N A 0110116'- @www Q BY @Zw/m ATTORNEYS. I

Oct. 14, 1941., F M, BRQOKE l2,258,945

CAMERA T0 GIVE PERSPECTIVE TO MOVING PICTURES Filed June 28, 1940 5Sheets-Sheet 4 .ZZZ L9 gg; FIG'LM JIL O W1 TNESSES; 100 INVENTOR.-

ATTORNEYS.

Oct. 14, 1941.

F. M. BROOKE CAMERA TO GIVE PERSPECTIVE TO MOVING PICTURES 5Sheets-Sheet 5 Filed June v28, 1940 INI/ENTOR: Frana'ooife,

BY Y ATTORNEYS.

W l TN ESSES Patented Oct. 14, 1941 CAMERA T GIVE PERSPECTIVE TO MOVINGPICTURES Francis M. Brooke, Bryn Mawr, Pa.

Application June 28, 1940, Serial No. 343,016

(Cl. Sii-16.6)

7 Claims.

The object of this invention is to give perspective to moving pictures.The method of producing this effect is to take alternate photographs asthe object would be seen first by the right and then the left eye, incontinuous sequence of alternations. The basis for this theory is thatthe image that is flashed on the screen for a very short time intervalis seen on the retina of the eye, or the sensation of sight remains inthe mind a considerably longer interval. Thisis the basis for theordinary moving picture. Notwithstanding the fact, that half the time ormore, there is no light upon the screen, there is the illusion to theeye that the picture is constantlyI on the screen and that certainobjects in the picture are moving. Actually there are a series ofpictures, where the background and much of the detail has not moved butcertain objects in the sequence of pictures are in a gradually differentrelative position.

Now, with a stereopticon camera, or double camera simultaneously takingtwo photographs with the lenses a few inches apart and then having thepictures in the same relative position as were the two films, by apartition between the two eyes and focusing magnifying glasses, it ispossible in still pictures to give real, deep and striking perspective.While this doubtless could be done with a moving stereopticon camera,the audience could not be bothered with the necessary elongatedequipment for their eyes. Therefore it is necessary to rely on thelingering of the last picture in the mind, merging with the succeedingone, giving a continuous composite eiIect of a view of the photographed'objects seen with two eyes simultaneously and accordingly graspingthree dimensions.

There is an average distance of about two and a half inches between thepupils of human eyes. Each eye focuses on the specific object on whichthe mind concentrates. This gives the effect of distance bytriangulation. It is the method of range finding for artillery re.Therefore by alternating photographs taken from two to three inchesapart, and having a corrected pointing of the camera at the emphasizedor central object for each alternation, the composite effect should givereal perspective. To have two cameras operating on a wide :dim would `bean' expensive process and call for special projectors. Two narrow filmswould require alternate splicing of the film.

Therefore practically the question resolves itself into the method ofone camera being moved from one side to the other a distance of two orthree inches between the taking of each photograph and simultaneouslypointing the camera from each position at the central or emphasizedobject at the correct angle, whether it is 10 feet or a mile from thecamera.

In carrying out this method the following means and their operation aredescribed:

First, however, another point should be considered. If we sit say tenfeet from a tree, and close first one eye and then, on opening it, closethe other, we note that certain objects are discernible by the right eyeand that the tree hides from the left; and conversely. With both eyesopen we see somewhat around the tree. each eye contributing something tothe vision that the other eye does not see, while most of the vision isjointly participated in by both eyes. Therefore, the composite movingphotograph covers more than a picture taken with a still camera, ascertain objects blot out all or parts of other objects seen from anyspeciiied position of the camera. This one eye vision from each cameraposition will tend to give perspective as it does to the eye in a threedimension field. The object therefore, is to show on the two dimensionscreen, what and as the human eye would have seen in a three dimensionworld.

l To explain the means of accomplishing the above, the followingdrawings are utilized.

Fig. I is a horizontal cross section of the camera taken along the lineI-I in both Figures III and IV.

Fig. II is a horizontal cross section taken along line 2-2 in FiguresIII and IV.

Fig. III is a vertical elevation from the left side of the camera withthe left side covering removed.

Fig. IV is a front elevation of the camera with the front cover andcertain parts adjacent thereto, for clearer view, removed, as laterenumerated.

Fig. V is a front view (vertical elevation) of the inner camera or darkchamber i'or the film showing the shutter.

Fig. VI isfa front view of the cap that covers the shutter and itsdriving mechanism and contains the lens; taken independently.

Fig. VII is an elevation of Fig. VI, looking from the bottom of thecamera upwards when the cap is xed in position.

Fig. VIII E a partial vertical elevation of thev ing for its visionwhile it travels from side to side.

Fig. IX is an internal view of the right side of the camera showing onlyits various spur gears attached along the line 9 9 Fig. IV.

In explanation Referring to Fig. I: l is a rotating shaft that revolvescircular eccentric cam 2 in sliding Aplate 3 in cage l. As cam 2 rotates3 slides forward and backward relative to the camera and simplyneutralizes any motion of l, forward and backward, as desired. Cam 2,however, forces cage d sideways along the grooves 5 of a frame Ei' withperiodic motion through a range of l and 17e inches.

To increase the range of camera movement from 1 and 11.; inches to 3inches, from one side to the other, it is only necessary to increase itslength 1 and eas inches and increase the action of cam 2 accordingly,with the corresponding changes in cage l and frame 5', and in theintermediate gears later mentioned.

At each extreme side position of cage (I there is an instantaneouscenter of no velociti7 and at that instant the shutter exposes the, lm,as later described.

As the inner camera base 6 is fastened on il,

the alternating spacing of 1 and f'e inches (or a greater distance if sodesired) by the camera between photographs is accomplished.

Referring to Fig. II: Shaft I is distorted to produce concentric cam l,which rotates in slide 9 containedin cage 9, which slides in grooves Il]of supporting frame II, which is fastened to the left side wall I2 andright side wall I3. It may be noted that slide 8 slides back and forwardtowards front wall I l and back walll I5, which cancels all movement asdesired in said direc- .tion but moves cage 9 from side to side towardI2 and then towards I3, the total action being a small fraction of aninch. It may be also'noticed, that cage 4 (Fig. I) and cage 9 aresynchronized so that both move in the same sideways directionsimultaneously and likewise have the maximum travel simultaneously, andthe same periods of no velocity. They are activated by the same shaft I.The lpurpose of cage 9 is to slightly lmove the direction of the innercamera base 6 (Figs. III and IV); by the movement base 4 (Fig. I) thecamera will point at the desired central object from both the left sideI2 and the right side I3, the inner camera pointing in, in bothpositions and this to a varying degree according as the desired centralobject is a few feet from the lens to a mile away. 'I'his adjustment ofthe change in angle from the determined cam and the transmission of thisaction is as follows:

Attached to cage 9 which slides in grooves I0 isvthe long split link I6with groove I'I. Pin I8 makes the rotable connection. The other end oflink I6 has a rotable connection with pin I9 in the fixed bracket 20 onthe back of the camera. I5. It may be noticed that as cage 9 slides fromside to side, the pin I8 moves the forward end of I6 an equal distancein the same direction. As the said forward end describes a small arc,the longitudinal play around lpin I8 permits I8 to describe the chord.

It may also be noted that the motion of the end of lI6 at pin I9 ispurely slightly rotary but with no sideways motion. Therefore, a scaleof sideways motion is established for I6. At I8 it is equal to thespread of the cam 1, a total of about a quarter inch, while at I9 it iszero. To utilize this scale there is the sliding pin 2| in groove I1,retained,- by the mushroom bottom and gap numbered 22 and 23respectively (23 see Fig.

It is only necessary to move pin 2l forward towards the front of thecamera I4 to increase the arc it describes, or back towards wall I5 todecrease the arc. There is a hand control 24 (see Figures I, III and IV)which fits around pin 2| with a cross groove 25. 29 slides in tracks insides I2 and I3 and extends out of the back of the camera I5 throughaccommodating holes. Therefore, by pulling member 2Q, which is made ofsheet steel, backwards or pushing it forward the relative position ofpin 2| is so changed. A calibrated scale on the external extension of 2dwill designate the correct position for the central object at thevarying distance from the camera lens.

In Fig. I the frame 5 has an extension 26 with a groove 2i through'whichpin 2l extends and is supported by previously mentioned mushroom top 23.Frame 5 is slightly mov-able in the grooves 2B in the sides I2 and I3and front I d. It pivots on .pin 29 in the center of Ill. Therefore bymoving pin 2i as described the position of frame 5 is turned a gradu-alangle by the movement of the cam and this movement intensified orminimized as'by operating hand control 24, pin 2i is slid along thesomewhat parallel grooves II (Fig. II) and 2l (Fig. I). i v

It should be noted that the action of the pin 2i becomes less as theradius from the pin 29 is increased or the control 24 moves it towardsI5 and less -as moved forward towards the front I9, in 29 Fig. I as wellas I6 Fig. II.

Therefore the effect is the same, or an increasing or multiplying effectas it receives from its relative position in I6, as previouslydescribed, and the opposite from a cancelling or a modifying effect.This is important as the change in the axis for the internal camerashould beA in a scale something like .05 of an inch to .0025- of aninch, dependent on the control object being a few feet to a mile fromthe lens. As frame 5 is turned so is cage 4 a like amount, and fastenedupon cage 4 is the base 6 of the internal camera (Figs. III and IV). r

The internal camera contains the lens, film,etc., so that it is evidentthat the action developed of cage I, and camera base 6, is the necessaryaction desired for the internal camera, described as the desired object:That is to take alternate pictures at a distance of the camera of abouttwo and a half inches apart (in a horizontal plane) andslmultaneouslywith a varying turnis utilized, showing the resultsobtained as soon as the above necessary actions have been developedrather than carrying through the rest of the apparatus which issupplementary but necessary and additionally complicated because it isnecessary to synchronize the various actions, provide against theinterference of moving parts and provide darkness where essential.

To continue the further detail and its operation. c

It is simpler for the reader if this anti-climax The shaft I whichoperates the cams 2 and 1 is held in position by the support 3II (Figs.III and IV). The diameter of shaft I is materially reduced atA I' insideof 30 so 'asto produce thrust bearings at the top and bottom of thesupport 39. The support 36 is preferably made in two opposing parts forconvenience in application to the reduced -part I' of the shaft I, asreadily understandable from Fig. III. The ends` of 30 are fastened tosides I2 and I3. Shaft I is also fitted into a circular recess 38 in thecamera bottom 3|.' Fastened on shaft I is the spur gear 32, which has va4 inch pitch diameter and is driven by an intermediate gear 3 3 (4 inchpitch diameter) which is held in position by the brace 34, and in whicha shaft 35 has journal bearing at its upper end; while the hub 36 ofgear 33 seats in a circular recess 31 in the bottom 3I of the camera.

Intermediate gear 33 is driven by the spur gear 39 shown only in Fig.III. Gear 39 is fastened on the driving shaft 4II. It should be notedthat the pitch diameter of gear 39 is l inch so that dividing it intogear 3-2 the ratio is one to four, of the driving shaft 4II and theshaft I, and consequentlythe cams 1 and 2. It should also be rememberedthat during each revolution of shaft I the cams 2, 1 reach their maximumside thrust position twice, and consequently the inner camera base 6, atwhich position there is no motion of the inner camera and the designedposition and moments for the snapping of the photographs. 'I'hereforethere are -two photograph positions for every revolution of shaft I.Shaft 4I) turns which in turn at an angle of 90 drives miter gear 46,which turns in a plane parallel to side I3. These miter gears 45, 46each have 1 and 1,/4" pitch diameter so 46, and its shaft 41 (see Figs.

III, IV and IX) have no change in velocity or driving rate from 4I).Shaft 41 is held in position by brace 48 (Figs. IV and IX) which braceis bolted on back I5.

Gear 46 and spur gear 49 are locked on shaft 41 in brace 48 so that theface of each gear acts as a thrust bearing against said brace. Spur gear49 has a pitch diameter of one inch, it meshes with gear 56 which has apitch diameter of 4 inches, and these two gears are in the same plane,

see Fig. IX and Fig. IV. Remember, gear 50 will revolve one quarter asfast'as. gear 49 on shaft 41 or shaft 40.. Gear 5I) is retained inposition by plate I through which the shaft 52 is in serted. The-otherend of shaft 52 is journaled in 'sidewall I3. Thus the face of the gears49, 50 lact as thrust bearings.

Plate 5I is drawnto scale in Fig. IX. It would hardly be visible betweenthe spur gears in Fig. IV, therefore/the width of 6I isto 1;/3 scalethere so as to` showwhite on each side of it and make it visible, thelength is correct as to. scale.

On shaft 5 2 is spur gear 53 which is dotted on Fig. IX and nowhere elsevisible. Gear. 53 .revolves like 50, one fourth as fast as the drivingor power shaft 40. 63 has a pitch diameter of one inch. In its plane,which is closer to side I3, than that of the gears 49 and 50, is theintermediate gear 54 and gear 55. The intermediate gear 54 is supportedby plate 5I, and incidentally has a pitch diameter of 2 and 1/2. Thissize is used for spacing, as an intermediary gear it in no way aects theultimate ratio. Gear 55 has a pitch diameter of 4" so it revolves butone-quarter as fast as gear 53, and, accordingly but one! sixteenth asfast as propeller shaft 40.

To simplify the synchronizing We now have a ratio of rate of revolutionsof gear 55 to shaft I, or the cams 2 and 1, of one to four.

Now gear 65 is fastened upon shaft 56 (Figs. IX, IV and III), and thehub of said gear is inserted in wall I3, while shaft 56 extends all theway' acrossthe camera to wall I2, where it is inserted, the recess beingutilized for both a lateral and thrust bearing. Shaft 56 also passesthrough the inner camera `but it is loosely encased, and as the casingis sealed there are no light leaks.

Now the inner camera rests on the slightly twisting and rapidly slidingcamera. base 6, therefore'the encasement of shaft 56 must have sunlcientclearance to prevent binding, while it must also drive various parts ofthe moving inner camera. The connection is as follows: See Fig. III. 51are keys or projections. that slide in the grooves 58, see also Fig. IV,which rotate both the hub 59 of spur gear, 6II and the drum 6I- for thefilm, whichis attached to hub 59. 62 is a part or extension ofthe base6- it is split at the intersection of shaft 56 for the insertion of hub59 and the upper back part 63 is screwed in place. Now while we arehaving both the periodic side ways motion of base 6 and the inner cameraand also a slight alternating twisting motion; the shaft 56 whose onlymotion is rotary, turns gear and film drum 6I clockwise looking from theright side I3 of the camera, and they are also synchronized in turningat a constant relative velocity to the shaft I, and the position oncecorrectly set never change.

Y The film, the description of the apparatus for which, in completedetail will later be described,

tion to hold the film in place on drum 6I, assurn ing the meshing of theteeth 64 with the holes in the sides of the fum. The nlm on paving thetop of the drum 6I makes a loop of about 2 inches of film hairpin shapedand is placed over the film support 66, Fig. III, and is held inposition by film retainer 6I, which is clamped open for inserting thefilm and then later released in posi- Vves tion by the part 68. Itshould be noted that in Fig. IV, parts 66, 61 and 68, as well as otherdetail between them and front I4 of the camera are omitted for clarityof view of the moving parts.

The film come's out of the bottom of the support 66 and retainer 61, islooped as explained relative to its entrance and then passes around thebottom of drum 6I, being retained in position by lower clamp 65. As isprobably appreciated, the excess loose film or play is due to the factthat the drum 6I turns at a constant rate said parts 66 and 61must bethe same rate per inch as the lm travels over and under drum 6|.

This is arranged by the iing'ers GSi-Figs. III f and IV.

These ingers 69 are moved upwards, then backwards until they penetratethe holes in the lm, pull the film downwards towards the bottom 3|,where the lm rests, being held .in position by the friction of thec,iilm support 66 and retainer 61 and moving only through said parts aseffected by the fingers 69. This leaves at alternate intervals,consequent spaces of lm exactly spaced on the centen of the support B6,opposite the camera. lens 83' for the intermittent iiashes of :lightcomposing the photographs.

The operation of the fingers 69 may be noted on Figs. III and IV asfollows: Member 19, o'n the ends of vwhich are the ngers 69, is heldagainst the retainer 61 by a spring which is concealed in thelattergures, the scope of which spring is limited by a hidden extension ofpart 1|, which is hung on pin 12 on which it can slightly rotate. Theother end of the part 1| is fastened by pin 13, which pin rotates withthe circular disk 11|.A It is obvious that as 14 rotates, part 1I at thepoint 15 where the member is attached,describes something of an ellipse.

Due to the-fact'that the member 19 can only.

be pressed by the hidden spring a certain dis- 82 is keyed to thecircular shutter 83, which has an opening 84, which when it coincideswith the opening 85 allows the light to flash on the lm.

It may now be noted that when the entire camera is correctly timed inassembling, it is completely synchronized and the desired results takeplace simultaneously.

The internal camera is moved to the extreme side of the main or externalcamera and comes for an instant to a complete stop and at this exactinstant the shutter snaps a picture. Also the internal camera has beenpointed with the correct angle at the central or desired emphasizedobject and this twisting movement has also temporarily ceased at thesame instant. The film has been moved through the internal camera so asto time perfectly with the operations and is also momentarily still.

Having covered the various operations more directlygit is well toconsider now certain details vof construction. First, however, theprovision tance towards the back I3, as disk 14 rotatescounter-clockwise (Fig. III) member 19 is clear of the retainer 61 onthe up stroke, then as the pin 13 moves towards the camera front wall|4, the member 19, like a seesaw moves, towards the camera back wall l5with iingers 69 passing the edges of theretainer 61 and nding the smallside holes in the nlm. As the pin 13 rotates towards the camera bottom3|, the

nlm is pulled through the nlm support 66 andl retainer 61 until said pinis at the bottom. As the pin 13 rotates towards the back wall 'l5 thengers 69 disengage, the film remains still while said fingers move upduring most of,a half revolution of the disk 14, preparatory for anotherIn Fig. III may be noticed the dotted circles 16 and 11 of l/ inchdiameter. These are the pitch circles of the hidden gears turning thedisk 14. Disk 14 is connected on shaft 18.

These are more distinct in Fig. IV, but here 11 is hidden behind 16. 11is an intermediate gear meshing both 16 and 69. As the pitch circle 'ofgear 69 is 4 inches and of gear 16, V2 inch, the desired ratio of 8 to 1is obtained. The necessity for this ratio was just previously explained.It is now only necessary-to have the camera shutter operate in correcttime with the lm movement just discussed. This is seen in Figures IIIand V. Gear 60 rotates spur gear 19, which is 1/ inch pitch diameter,giving the necessary ratio of 8 to` 1. 19 is keyed to shaft 80 which isheldin position by support 8| in channel 82 (both seen in Fig. VII) andare placed when the cap containing the lens 83' is placed for the iilmbeing received by and taken from the drum 6I which was mentioned wouldbe later explained, should be covered: In Figs. III and IV there is asidewall 86, resting on base 6. In Fig. III may be notedhinges 81 whichhold the extension of wall 86, number 88. vFastened on extension 88 arethe regular axes 89 to hold'the spools 9|, 92 for the nlm. By swingingextension. 88 forward at a right angle, the new film can be placed onthe axis 89 on which it can turn with a resistance to prevent slack. Theextension 88 is then closed in the same plane as the wall 86 and held bythe catch 88'.

In Fig.'IV 92' indicates the visible -tops of the sidewall of the lmspool 92.`

The film is laid in Vthe tracks of the spool 92 (Figs. III and IV) andfrom there over the drum 6|. From there on the travel of the lm back tothe drum. 6I has previously been debut to keep suiiici nt tension towind it iirmly on the spool 92.

Extension 62 is an integral part of base 6 to support the shaft 18, hub59 and the intermediate gear 11, also the sidewall 86 is screwed to 62to support it. On the extension 62' are afxed the various parts of theinner camera on v its right side (Fig. IV). A

On the front of extension 62is screwed the front 96 of the inner camera,Figs. IJI and V, which front 96 supports the shutter 83 and the cap 91,Figs. VI'and VIII. It is also in conjunction with the cap 91 to keep alllight out of the ,inner on the front of the inner camera. The cap is era|05 (see Fig. HI) which is an addition or ex l tension to the base 6 onwhich it is screwed and then turns up 90 to form the back and is screwedinto support top |04 and side walls |00. The right side |02, Fig. V,must have a removable section to change the film spools 92 and 9|.Therefore, support-s |03 are screwed on it and re- -moved with it. Thumbscrews through iront 96 and inner camera hold it in place. Interlockingjoints can be used in the edges of the four sides and top of the boxdescribed to seal them against light. Incidentally, the supports |02,|03, etc., can be used for additional screening, The front part ofsupport |02 is screwed securely to the ilexible tube |06, Fig. V,covering shaft 56, to lseal light, is attached to the forward part atsides |00 and |02. In Fig. VIII is a partial view of the front of thecamera |4 to show a rectangular space or opening of convenient size, toallow for the side movement of the lens 83' up to 3 inches, for themanual adjustment of an iris if attached to the lens, etc. This is theonly place where light leaks into the main camera. This can be cured, ifdesired, by fastening a loose cloth, |09, under the edge of 91 andfastening it to the inside of front I4, just as has been successfullyused in panorama cameras; see curtain |09 also in Fig. VIII partiallycut away. This is loose enough to permit the movement of the shutter cap91, and is fastened on the inside behind the opening aforesaid.

In fact, if this method is employed the sidewalls |00, |02, |05 and top|04 can be dispensed with.

It should be mentioned that in the Isidewall l2 there is a door |01, asindicated by dotted lines in Fig. IV that starts behind shaft 56, and adoor |08 inv the top 42 as indicated Figs. III and IV. The iirst is foraccess to the nlm spools 9| and 92, and both for oiling. These doors|01, |08 are held in place by thumb locks Support 30 and brace 34 arescrewed to sides I2 and |3 and add additional strength to the maincamera, which is screwed together at the 90 edges, which can beinterlocked in steps if desired as greater security against light.

Attention is also called to the fact that the more recently marketedmagazine which is already loaded with 50 foot rolls of 16 millimeter lmand spare spool, with certain adjustments and modiiications of thesubject camera, could be readily substituted for the majority of theinterior camera.

Having herewith described my invention, I claim the following:

1. In a moving picture camera an eccentric cam in a sliding plate in asliding frame giving a slight alternate side moton to an elongated linkwhich turns at its opposite end where attached on the back of thecamera, said link containing a sliding pin with mushroom shaped top andbottom, operating in long groove in center of said link, said pin beingsubject to movement from external manual control by a plate which slidesin grooves in cameras sides and said plate has a small groove at about90 degrees to groove in link, and extension arms on which are calibratedfor corresponding distances from the lens to photographed centralobject, a superimposed link extension, withslit, containing top portionof said sliding pin, which is a part of another frame, working ingrooves in the side of the camera and turning on a pin in the center ofthe front of the camera, which frame contains a sliding cage whichoscillates by the action of another cam, such cage being the base forthe base of the camera.

2. In a moving picture camera, two concentric cams in different butparallel planes, one with the action a few inches, the other a smallfraction of an inch, both encased in slides in sliding cages; which camsare synchronized so as to have their maximum side movement and periodsof rest at simultaneous intervals, the action of the smaller cameffecting by a twisting motion the position of the frame for the upperand larger cam through the connection of a sliding pin which rides in afixed link extension of said upper frame in a groove on slot in saidextension, said pin sliding in slot of link connected to cage of smallerand lower cam, and the travel of said pin through the slots insaidextension and link being controlled by a manually operatedcalibrated extension of a sliding plate, located between the planes ofsaid camssaid plate having a slot perpendicular to the prior mentionedslots, which holds the said pin in the desired position, or advances itto such position, for the purpose of turning the cage of the large cam,which in effect is the base for the camera base, effecting the anglethat is desired.

3. In a moving picture camera; a base for an inner moving picturecamera, which base rests upon a cage that moves `alternately'from sideto side a desired and predetermined `distance of about two and a halfinches, said cage slides in a frame which is free to turn a slight angleas effected by another cam, which produces a side to side action ofabout a quarter of an inch and said action is transmitted to the frameby a movable pin in a slot ina link and in a slot in an extension of thesaid frame, and is controlled by a plate that slides and can be moved byhand by the extension that extends through the camera, and on whichdesired distances are scaled, said plate controlling the position of thepin in the two mentioned slots.

4. In moving picture apparatus, a. camera supporting-frame, a slide insaid frame, an eccentric cam in the slide; a second frame in which thesupporting-frame is reciprocative; a pivot at one end of the secondframe, and means at the opposing end thereof for variably controllingits angular movement; and means whereby the eccentric vcam is rotativeto effect conjoint reciprocation of the slide in one direction withalternate movements of the camera supporting-A frame in anintersectingly related direction.

5. In a moving picture apparatus, a camera supporting-frame, a slide insaid frame, an eccentric cam rotatively mounted in the slide; a secondframe in which the supporting-frame is laterally and alternatinglyshiftab'le; a pivot at :the forward end of'the second mentioned frameanda slotted extension at the rear end thereof; cam actuated meanscoactive with said slotted extension for variably controlling angularoscillation of the second mentioned frame; and means whereby theeccentric cam is rotative to eiIect conjoint reciprocation of the slideto and fro with alternate movements of the camera supporting-framelaterally.

6. In a moving picture apparatus, a camera 'Y supporting-frame; a plateslidable in said frame;

a circular cam, rotative in a complemental groove in the slidable plate,rigid with an eccentrically related drive-shaft; a second frame in whichthe supporting-frame is shiftable alternately sidewise withindeterminate limits; a medial pivot at the forward ,end of the secondmentioned frame, and an aligned slotted extension at the rear endthereof; a second cam on the driveshaft in parallel with the slide platecam means operatively coordinating said cam with the seo-1n ond frameincluding an element shiitable along the slottedextension thereof toeect its variable angular oscillation; and means whereby both camsaforesaid are simultaneously rotated to effect reciprocation ofthe'slidable plate forwardly and rearwards with concurrent movements of`the camera supporting frame alternatlngly sidewise.

7. The combination of claim 6, wherein the drive-shaft embodies adistorted portion providin'g the second cam, a slide concentricallyrelated to the drive-shaft operatively engages the shaft distortedportion, a iframe affords slight reciprocative support for said slidewith concurrent similar movement laterally, and means synchronize saidmovements with those of the camera supporting frame, such meanscomprising a l

